# apng2gif を Homebrew, apt, Nix でインストール apng2gif のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。 ## インストール ```sh sudo av install brew:apng2gif ``` 追加のインストールコマンド: ### macOS - Homebrew (100%): ```sh brew install apng2gif ``` 証拠: local Homebrew formula metadata ### Linux - Debian apt (92%): ```sh sudo apt install apng2gif ``` 証拠: Debian stable package indexes: apng2gif from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#apng2gif ``` 証拠: nixpkgs package indexes: pkgs/by-name/ap/apng2gif/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 ## パッケージ情報 - **パッケージキー:** brew:apng2gif - **パッケージマネージャ:** Homebrew - **パッケージマネージャページ:** - **バージョン:** 1.8 - **ソース概要:** Convert APNG animations into animated GIF format - **ホームページ:** - **上流ドキュメント:** - **ライセンス:** libpng-2.0 AND Zlib - **ソースアーカイブ:** - **生成日時:** 2026-07-08T07:18:31+00:00 ## 実行可能ファイル - apng2gif (cli) - apng2gif (エイリアス) ## 依存関係 - libpng ## インストール挙動 - post-install フック: 未定義 - Bottle: 利用可能 対象 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura ## バージョンと鮮度 - ページ生成日: 2026-07-08 - マネージャ版: 1.8 - ローカルデータ: OK - 上流リポジトリ: https://apng2gif.sourceforge.net/ - 情報: No package-manager update timestamp was available. - 情報: Release/tag comparison is only available for GitHub repositories. ## プロジェクトの歴史と使われ方 apng2gif is a small SourceForge-hosted converter that turns Animated PNG files into animated GIFs. The official page says it respects APNG frame delays and loop counts while providing transparency-threshold and background-blending options. ### プロジェクトの歴史 The project page presents apng2gif as a focused APNG-to-GIF converter with both a command-line version and a Windows GUI. It is distributed through SourceForge along with source and prebuilt binaries for major desktop operating systems. The SourceForge 1.8 file page records an improved APNG decoder based on apngdis 2.9, loop-count adjustment, duplicate-frame optimization, and 64-bit Windows binaries. That is about as much public project history as the official sources expose. ### 採用の歴史 apng2gif adoption is naturally narrow: it serves people who keep high-quality APNG masters but still need GIF output for older or more constrained web/image pipelines. The official page explicitly frames webmasters as a practical audience. ### 使われ方 The documented command line is apng2gif anim.png [anim.gif] [-t tlevel] [-b bcolor]. The -t option controls transparency threshold, the -b option blends against a background color, and -b overrides -t. The project page describes converting 24/32-bit APNG to a single global 256-color GIF palette using a Wu quantization grid, which is the practical tradeoff behind the tool: keep APNG masters, generate GIF fallbacks when needed. ### パッケージ好きにとっての重要性 apng2gif is the kind of tiny media converter package that survives because it does one format edge case well. Its value is not breadth; it is a low-friction CLI for APNG fallback assets and batch conversion. It also sits in a small APNG tools family where each utility handles one direction or maintenance step in an animated-image workflow. ### タイムライン - 2017-05-19: The SourceForge 1.8 file page records source and binary artifacts and README text. - 2017-05-22: The SourceForge 1.8 file page records the 32-bit Windows GUI binary. - 1.8: Release notes record an improved decoder based on apngdis 2.9 and duplicate-frame optimization. ### Related projects - The official page links gif2apng, apngasm, apngdis, and apngopt as related APNG tools. ### ソース - - ## セキュリティノート narrow executable package without higher-risk signals. - **Geiger リスク:** グリーン / 低 - narrow executable package without higher-risk signals ## ソースデータベース詳細 - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** apng2gif - **Version Scheme:** 0 - **Revision:** 0 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## 他のパッケージマネージャ記録 - Debian apt - apng2gif - 1.8-5+b1: normalized package name match | Debian stable package indexes: apng2gif from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | tool for converting APNG images to animated GIF format | https://apng2gif.sourceforge.net - Nix - apng2gif: normalized package name match | nixpkgs package indexes: pkgs/by-name/ap/apng2gif/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - apng2gif - 1.8-5build2: normalized package name match | Ubuntu 24.04 LTS package indexes: apng2gif from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | tool for converting APNG images to animated GIF format | https://apng2gif.sourceforge.net ## 関連リンク - [Terminal utility packages](https://www.automicvault.com/ja/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Text processing packages](https://www.automicvault.com/ja/pkg/text-processing-tools/) - Matched text, document, or structured-data processing metadata. - [Networking and protocol packages](https://www.automicvault.com/ja/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Media and graphics packages](https://www.automicvault.com/ja/pkg/media-graphics-tools/) - Matched media, image, audio, video, or graphics metadata. - [libpng](https://www.automicvault.com/ja/pkg/brew/libpng/) - Runtime dependency declared by Homebrew. - [gif2png](https://www.automicvault.com/ja/pkg/brew/gif2png/) - Shares av.db curated category or tags: cli, gif, image-conversion, media. - [gifski](https://www.automicvault.com/ja/pkg/brew/gifski/) - Shares av.db curated category or tags: animation, cli, gif, media. - [agg](https://www.automicvault.com/ja/pkg/brew/agg/) - Shares av.db curated category or tags: cli, gif, media. - [apngasm](https://www.automicvault.com/ja/pkg/brew/apngasm/) - Shares av.db curated category or tags: apng, cli, media. - [durdraw](https://www.automicvault.com/ja/pkg/brew/durdraw/) - Shares av.db curated category or tags: animation, cli, media. - [gifcap](https://www.automicvault.com/ja/pkg/brew/gifcap/) - Shares av.db curated category or tags: cli, gif, media. - [gifify](https://www.automicvault.com/ja/pkg/brew/gifify/) - Shares av.db curated category or tags: cli, gif, media. - [gifsicle](https://www.automicvault.com/ja/pkg/brew/gifsicle/) - Shares av.db curated category or tags: cli, gif, media. - [imagemagick](https://www.automicvault.com/ja/pkg/brew/imagemagick/) - Both packages work with overlapping file formats or content types. Shared terms: cli, conversion, convert, image, image-conversion. - [jp2a](https://www.automicvault.com/ja/pkg/brew/jp2a/) - Both packages work with overlapping file formats or content types. Shared terms: cli, conversion, convert, image, image-conversion. - [libicns](https://www.automicvault.com/ja/pkg/brew/libicns/) - Both packages work with overlapping file formats or content types. Shared terms: cli, conversion, format, image, image-conversion. ## Combined YAML source View the package source record on GitHub. [combined/apng2gif.yml](https://github.com/automic-vault/db/blob/main/combined/apng2gif.yml) ## ソース - Nucleus package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph